Jumper Configurations
Table A-1
Jumper Descriptions (continued).
JUMPER #
DESCRIPTION
W6(A,B)
Jumper W6A brings the STD bus interrupt
request (INTRQ*), inverted once, to the
interrupt request 2 (IR2) on the interrupt
controller. Jumper W6B brings the output of
timer 2 to IR2. Factory default installs W6A.
W6A
W6B
Function
IN †
OUT
INTRQ* STD bus signal drives IR2
OUT
IN
Timer 2 output drives IR2
W7(A,B)
Install W7A to bring frontplane interrupt
request 3 (FP3*), inverted once, to the
interrupt request 3 (IR3) on the interrupt
controller. Install W7B to bring serial port 2
(COM2) interrupt request to IR3. Factory
default installs W7B.
W7A
W7B
Function
IN
OUT
FP3* frontplane signal drives IR3
OUT
IN †
Serial port 2 (COM2) drives IR3
A-6
